Casle Lane is a street in London's central, Westminster area, just a few steps from some of the capital's most iconic monuments. Overlooking the bell tower of Westminster Chapel, the street is characterised by the brick cladding of the terraced houses and Victorian mansions. New constructions are subject to strict regulations to preserve street size and atmosphere.

For the construction of a new residential building, Droo proposes a project respectful of the tradition and imposed obligations but shamelessly contemporary.

The architects carefully examined the composition and details of the surrounding facades and interpret a classic element of British architecture, the bow-window. The windows move the otherwise flat façades in a sinuous and light way, and provide a link between the interiors and public spaces.